Impregnated blade coating

Abstract

A blade for treating fibrous nonwoven webs having a base body and a coating covering at least a part of the surface of the base body. The coating forms at least that part of the blade surface which is provided to come into contact with the fibrous nonwoven web. At the contact surface, the coating has an open-pored material, the pores of which are filled at least partly with a polymer.

What is claimed is: 
     
         1 . A blade for treating a fibrous nonwoven web, the blade comprising:
 a base body having a surface;   a coating covering at least part of said surface of said base body, said coating forming at least a part of a surface of the blade which contacts the fibrous nonwoven web, said coating having on a contact surface an open pored material including a plurality of pores, said pores being filled at least partially with a polymer.   
     
     
         2 . The blade according to  claim 1 , wherein said polymer is an epoxy resin. 
     
     
         3 . The blade according to  claim 1 , wherein said polymer is a silicone polyester resin. 
     
     
         4 . The blade according to  claim 3 , further comprising a plurality of fillers embedded in said polymer. 
     
     
         5 . The blade according to  claim 4 , wherein said fillers contain fluorinated ethylene. 
     
     
         6 . The blade according to  claim 5 , where said fluorinated ethylene is polytetrafluoro ethylene. 
     
     
         7 . The blade according to  claim 4 , wherein said fillers are a plurality of particles. 
     
     
         8 . The blade according to  claim 7 , wherein said plurality of particles have a median diameter in the range of between approximately 0.1 and 5 micrometers (μm). 
     
     
         9 . The blade according to  claim 1 , wherein said polymer includes fluorinated ethylene. 
     
     
         10 . The blade according to  claim 9 , wherein said polymer includes polytetrafluoro ethylene. 
     
     
         11 . The blade according to  claim 10 , wherein said polymer is in the form of a plurality of particles having a size distribution, at least 65 percent (%) of said plurality of particles of said polymer being of at least one size in a range between 50 and 100 nanometers (nm). 
     
     
         12 . The blade according to  claim 1 , wherein said open-pored material of said coating includes one oxide or a plurality of oxide ceramics. 
     
     
         13 . The blade according to  claim 12 , wherein said open pored material of said coating is one of aluminum oxide, zirconium dioxide, magnesium oxide, chromium (III) oxide, yttrium oxide and titanate. 
     
     
         14 . The blade according to  claim 1 , wherein said open-pored material of said coating includes a hard metal. 
     
     
         15 . The blade according to  claim 1 , wherein said open-pored material has a porosity in a range of between approximately 2% and 10%. 
     
     
         16 . The blade according to  claim 1 , wherein a median pore diameter of said plurality of pores has a value in a range of from approximately 5 to 15 micrometers (μm). 
     
     
         17 . The blade according to  claim 1 , further comprising a bonding agent layer arranged between said coating and said base body. 
     
     
         18 . The blade according to  claim 1 , wherein the blade is configured as a creping doctor including a working edge and an abutting surface. 
     
     
         19 . The blade according to  claim 1 , wherein the blade is a doctor blade.